Hello and welcome to OpenStreetMap!

As you’ve no doubt noticed, edits that you make update the one shared map that everyone sees.

That’s why it’s important that only valid edits are made to the map.

If you want to experiment with the editors, you can do so over at http://api06.dev.openstreetmap.org (an exact copy of the main site apart from the map display). If you want to map an imaginary world, http://opengeofiction.net/ might be what you’re looking for.

Best Regards,

Taya Snijder, on behalf of OpenStreetMap’s Data Working Group